Reversing hammer drill

Details Reversing hammer drill Reversing hammer drill

1978-08-03

1980-09-23

Reynolds, Wm. Carter

Tool driving or impacting

Drive adjustable to completely change kind of drive

Adjustable to impacting device

307115, 318245, 318289, E02D 702

Patent

active

042237440

ABSTRACT:
A hammer drill having a bypass switch which is activated by the selector ring to prevent the drill from operating in the hammer mode by shunting the reversing switch. This is a precaution to prevent damage to the clutch teeth which are designed for ratchet action when the tool is operated in the forward direction, but will lock down in reverse to stall tool or damage the mechanism. In the drill mode, the bypass switch connects the reversing switch in circuit with the on-off switch.

REFERENCES:
patent: 2072551 (1937-03-01), Forss
patent: 3147423 (1964-09-01), Du Rocher
patent: 3260827 (1966-07-01), Frenzel
patent: 3789933 (1974-02-01), Jarecki
patent: 3802518 (1974-04-01), Albert
patent: 3809168 (1974-05-01), Fromm
patent: 4145640 (1979-03-01), Kipp et al.

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